<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>新增属性2</title>
</head>
<body>
    这是<mark>一篇</mark>文章
    <menu>
        <ul>
            <li>1</li>
            <li>2</li>
            <li>3</li>
        </ul>
    </menu>
    <address>gaoyuan</address>
    <form action="index.html" method="get">
        <input type="text" name='username'>
        <input type="submit" value="提交">
    </form>
    <dilog>
        <dt>张三：</dt><dd>你好</dd>
        <dt>李四：</dt><dd>你也好</dd>
    </dilog>
    <details>
        <summary>haha</summary>
        <p>qwer</p>
    </details>
    <progress max="100" value='30'>
        <span>30%</span>
    </progress>
</body>
</html>